Grinding-mill.



Y c. w. 1151131111. GRINDING MILL.

APPLIOATIOK FILED HOV. 13, 1909.

v '0. W. RNBAR.

GRINDING MILL. APPLIUATION FILED NOV.13,'1909.

Patented ot.25,191o.

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w. RENEAR.

GRIN DING IMILL. APPLIUATIOI Hmm lov. 1s, 1909.

`Patented Oct. 25, 1910.

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GBINDING MILL. v .APPLIOATION FILED 13, 1909.

Patented 0et.25,191o.

5 SHEBTHHBET 5.

UNITED STATES PATENT OFFICE.

CHARLES W. RENEAR, OF HONOLULU, TERRITORY OF HAWAII, ASSIGNOR TO RENEARCOMPANY LIMITED, OF HONOLULU, TERRITORY OF HAWAII.

GRINDING-MILL.

To all whom 'it may concern:

Be it known that I, CHARLES W. RENEAR, a citizen of the United States,residing at Honolulu, in the Territory of Hawaii, have invented certainnew and useful Improvements in Grinding-Mills, of which the following isa specification.

My invention relates to certain new and useful improvements in grindingmills and particularly to a mill adapted to successfully handle theAlgarroba bean, which is the product of atree found in great quantitiesinthe Hawaiian Islands. This bean consists of a pod containing littlehard seeds, the seeds themselves constituting fully onehalf of the foodvalue of the entire bean but which if not properly crushed or groundwill not be properly digested by stock to which it is fed and willproduce deleterious results. I have produced grinding rolls which willproperly grind and crush this bean, which rolls form the subject matterof my copending application Serial No. 485,196, filed March 22, 1909 andI shall refer thereto in a description .of the construction of theserolls. In the use of these rolls I find that if the beans have been keptbefore grinding, they will stick to the rolls even as constructed asdescribed in my application referred to. I have further discovered thatby spraying the rolls with lime water this sticking tendency will beentirely overcome. I have also discovered that in order to prevent thebeans when crushed from absorbing sufficient lime water to cause them tosour, it is necessary to spray the rolls with a vapor in order noty tosupply too great an amount of water and that the water in the form ofvapor-will operate to entirely prevent t-he beans sticking on andbetween the rolls.

With the form of rolls shown in my application referred to, I find thatit is necessary to separate all foreign matter from the beans beforethey pass into the roll as if 'any scrap of metal or stone pass betweenthe rolls with the beans, the rolls would probably be broken, due to thefact that this foreign matter will lodge in the pockets which existtherein. I therefore find it necessary to provide my mill with aseparating device which ispeculiarly adapted to separate the foreignmatter from the Algarroba beans. This is due to the fact that thesebeans are of a peculiar shape and of such a weight as to Specificationof Letters Patent.

Application filed November 13, 1909.

Patented Got. 25, 1910.

serial No. 527,802.

permit of their being handled in a way that other materials cannot be. Ihave also dislcovered that for the successful operation Re erring to thedrawings wherein the same part is designated by the same referencenumeral wherever it occurs, Figure 1 is a side elevation of the completegrinding mill. Fig. 2 is the top plan view partly broken away. Fig. 3 isa central longitudinal section showing the left hand end of the machine.Fig. 4is a central longitudinal section showing a continuation of themachine from that shown in Fig. 3. Fig. 5 is a detail perspective viewof the sprinkler mechanism, showing the same separated from the machine.Fig. 6 is a central longitudinal section of a sprinkler head.

Mounted upon the frame 9 is a second frame 10 also of rectangular formand on which are mounted the journal boxes 11 for the grinding rolls 12which rolls are preferably constructed in accordance with my inventionas disclosed in my pending application referred to, and for a specificdescription of the construction and operation of these rollsreference ismade to said application.

The bearing shafts 13 of these rolls are extended on one side and carrythe pulleys 14, the shaft 13 of one of the rolls being also extendedbeyond the other bearing where it carries a driving pulley 15 connectedby a belt 16 to a pulley 17 on a suitable bearing-shaft 18. Beyond thepair of pulleys 14 and in a line therewith, I preferably provide a thirdpulley 19 mounted on shaft 20 which shaft is mounted in adjustablejournals 21 which may be adjusted toward and away from the journals 11by means of the set screws 22 in 'any suitable manner.

23 is a belt which as best shown in Fig. 2

has its upper run extending over all three ofr the pulleys 14, 14 and 19and its-lower run looped over the middle pulley 14, whereby the tworollers 12 will be driven in opposite directions as is necessary. Bymeans of the adjustable shaft 2O for the pulley 19, the

slack in this belt may be taken up and the tension of the pulleys variedas desired, so that when too lgreat resistance is offered to thegrindingrolls the belt may slip and thus lessen the chance of breakingthe'teetli on` supply pipe 29 having a valve 30'to con-- trolthe flowofliquid froin'thelpipe29"to thepipe28'. The pipe 29 is connected to anydesired source of liquid supply andthe liquid which Thave found t'o bebest^adapted is lime'water'.

Each ofthe'heads 25'isprovided'at one end witha' recess 31'which isconnected to therecess 26 by the 're'ducedopening 32, and 33'is` a*needle valve operating in the pa's sageway 32 and controlling the flowof liq uidffroni the recess 26.

33 is apipe extending out from-the recess 32, said pipe terminating" ina4 down# turnedend 34. As willbe seen from'Fig: 6r

the pipe 33a extends centrally through the recess 31.

35'is a. pipe threaded intothe cute-nendof the recess 31 and surroundingthepipe 33".1 Thepipe`35 is closed at` its outer'end andinits side isprovided withan opening 36 through which the downturnecb-end 34 of thepipe 33projects, said opening 36 being.. slightly larger in diameterthan the end 34.

37 is .aA pipe extending to the side of the head 25 and connected to therecess-31, by a section of hose 38. The pipe 37l connects with one endof a pipe 39 which in'tui'n` is connected to an air blower 40 drivenfrom the pulley 41 on the shaft 13 by means ofv the belt 42. The blower40 is of any ordinary or desired forni and is for the purpose of forcingair into the pipe 35 from which it escapes around the reduced end 34 ofthe lower water pipe 33a, thus forming an atoinizer. The pipes 33 and 35are of' such= a length that they will extend out from the head 25 overthe axial portion of one of the rolls 12. 1n order to oscillate thesepipes over the rolls to distribute the vapor delivered therefrom overthe entire surface of the rolls, T provide each of the standards 24 Eachhea dnear its base with a laterally extending arm 43which is connectedto a rod 44 having one end connected to a crank pin 45 carried by disk46 mounted on a shaft 4T driven in a'iiianner hereinafter described.From an inspection of Fig'. 2 it will be seen that upon `the rotation-of the shaft 47 the free ends of the pipes 35 will be oscillated backand forth over the rolls 12.

The beans to be ground aie dumped into a hopper 4S of any desired formmounted 'upoii'a frame 49 and pass on to a conveyer belt 50i-mining onsuppoitingrolls 51, 52

and 5o, therolls being mounted in a frame 54 extending beneath the lowerend ofthe hopper 48 andup'over the grindingmechaiiisin just described.The conveyer belt- 50,`

however, only extends from the adjustable roll 51 to theroll-53 whichis'inouiit'ed oii=af shaft 54 carrying'a pulley connected by a belt56fw-itha-pulley 57V onthe shaft 13.l

58vv is a second coiiveyer beltrunning overL siipportiiigrollers 59inounted-in thefraine 54. The upper en'd of the belt 5Sruns over-` anadjustable driving` roller 60 driven from thepulley 61 on oppositeeiidof the shaft 54 from that carrying a pulley 55 by means Between theadjacent ends` ofiy thebelt 62. of the conveyer belts50 and 58 aspace-is left4` intol which projects the funnel-shaped opening-63 of thepipe 64 extending` fromla blowerf65of any ordinaivor desired conwvstruction, saidblower being driven by belt.E

66 from the pulley` 67`on the shaft 13.

68 isa: wheel. provided with a series ofribs 69 extending longitudinallythereof and` projecting axially therefrom. This wheel* is mountedI inbearings T() which are adjustable by means of the set` screws T1 towardand away from the belt 50 whereby the distance between thewheel andthesur# face-belt may be varied as desired.` This wheel vis-driven'by meansof a belt 7-24 running froni a` pulley 7301i one end of the. shaftcarrying said wheel to a pulley T5 on the shaft In the foregoingdescription it will be seen that when the Algarroba beans are dumped inquantity in the hopper 4S they will be caught by the'conveyer belt-50and carried forward. The ribbed wheelI 68 is, however, driven in theopposite direction fromithat of the conveyer belt so that the ribs onthe wheel will operate to spread the beans outina thin, even layer, thethickness of the layer depending" upon the.v distance away from the beltto which thewheel is adjusted. As the beans reach the eiid'of the travelof' the conveyer belt 50 they will.

funnel and drop into a chamber 75 formed in the side of the fan orblower. The light particles of dirt or trash will be blown upward andout of the mass of beans. The beans after having been cleaned by theblower will pass upwardly on the belt 58 and be dumped off the end ofthe belt between the rolls I2 where they will be crushed in the mannerfully set forth in my pending application previously referred to. Theshaft 47 carrying the disk 46 and the crank pin 45 is driven by means ofa belt 7G passing around the pulley 77 on the shaft 47 and also aroundthe pulley 78 on the shaft 54. After the beans have been ground in themanner described, they drop upon a conveyer belt 79 running oversupporting rolls 8O which preferably and as shown are longitudinallyadjustable in the frame 8l in order to vary the tautness of the belt. Atthe upper vend of the frame S1 I provide a hopper 82 into which theground beans fall as they pass off the end of the conveyer belt 79.

I realize that considerable variation is possible in the details ofconstruct-ion and arrangement of parts without departing from the spiritof my invention, and I therefore do not intend to limit myself to thespecific form shown and described.

What I claim as new and desire to secure by Letters Patent isl. In agrinding machine for Algarroba. beans and the like, the combination witha pair of rolls having grinding surfaces thereon, said rolls running incontact with each other, means for delivering an atomized liquid spraydirectly to the periphery of each of said rolls, means for oscillatingsaid atomizing means to move said atomizing means longitudinally of saidrolls whereby to directly meisten the entire surface of each roll beforeit meets the material to be ground. y

2. In a grinding machine for Algarroba beans and the like, thecombination with a pair of rolls having grinding surfaces thereon, saidrolls running in contact with each other, of a spraying pipe pivoted atthe side of each roll so that the spray-delivering end may be moved overthe roll from end to end thereof, arms connected to said pipes, and arod joining said arms and connected to the driving mechanism of the millfor oscillating said spraying pipes.

3. In a grinding machine for Algarroba` beans and the like, thecombination with a pair of rolls having grinding surfaces thereon, astandard extending upwardly opposite the middle of each'roll, a headmounted upon said standard, a liquid supplying-pipe extending throughsaid standard to said head, an air-supplying pipe extending to saidhead, a pipe extending out from the head and terminatingv over itsrespective roll and connected to the liquid supplyingpipe, a second pipesurrounding said last mentioned pipe and connected to said airsupplyingpipe whereby an atomizer is formed at the free yend of said combinedpipes, a valve in the head for controlling the supply of liquid, meansfor supplying compressed air to the air-pipe and means for oscillatingthe free end of said pipes lengthwise of said roll whereby the surfaceof the roll is moistened before meeting the material to be ground.

4. The combination with a pair of rolls adapted to grind Algarroba beansand the like, of a conveyer belt mounted in position to deliver thebeans to be ground between the rolls, a second conveyer belt mounted inline with the first conveyer belt with the adjacent ends of the beltsseparated, both belts being upwardly inclined toward said rolls, anozzle mounted between the adjacent ends of the belts, a blower forsupplying air under pressure to the nozzle, and means for driving thegrinding rolls, the conveyer belts and the air blower.

5. The combination with a pair of rolls adapted to grind Algarroba beansand the like, of a conveyer belt mounted in position to deliver thebeans to be ground between the rolls, a second conveyer belt mounted inline with the first conveyer belt with the adjacent ends of the beltsseparated, a nozzle mounted between the adjacent ends of the belts, ablower for supplying air under pressure to the nozzle, a roller havingribs running longitudinally thereof and extending axially therefrom,said roller being mounted vover the top of the second-mentioned conveyerbelt, means for driving the conveyer belts, the blower, and the roller,the said means operating to drive the roller in the opposite directionfrom the movement of the conveyer belt over which it is mounted. Intestimony whereof I have affixed my signature in presence of twowitnesses.

CHARLES W'. RENEAR.

Vitnesses:

A. LEWIS, Jr., Oris GUILD.

